No idea about either the original or the modification – possibly to do with Ed Balls Day, April 28th? Please comment/e-mail if you know more.
Update: Based on the comment from ‘anonymous’, the original was the symbol of Generation Identity, a lambda in a circle (discussed previously in Identity Movement Ireland), which was then blotted out by the anarchists and further modified with “Edd Balls” by a wag.
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Copyright © 2018 Seosamh Mac Coılle
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Extramural Activity 
The original are Generation Identity, an active far-right organisation in the UK